<?php 
if(!defined('YGZWEB')){
	exit('Access Denied');
}
class mysql {
	var $querynum = 0;
	var $link;
	var $tnames;
	var $charset;
	function connect($dbhost, $dbuser, $dbpw, $dbname = '', $pconnect = 0, $halt = TRUE) {
		if($pconnect) {
			if(!$this->link = @mysql_pconnect($dbhost, $dbuser, $dbpw)) {
				$halt && $this->halt('Can not connect to MySQL server');
			}
		} else {
			if(!$this->link = @mysql_connect($dbhost, $dbuser, $dbpw, 1)) {
				$halt && $this->halt('Can not connect to MySQL server');
			}
		}

		if($this->version() > '4.1') {
			if($this->charset) {
				@mysql_query("SET character_set_connection=$this->charset, character_set_results=$this->charset, character_set_client=binary", $this->link);
			}
			if($this->version() > '5.0.1') {
				@mysql_query("SET sql_mode=''", $this->link);
			}
		}
		if($dbname) {
			@mysql_select_db($dbname, $this->link);
		}
	}
	
	function tname($tablename){
		return $this->tnames.$tablename;
	}

	function select_db($dbname) {
		return mysql_select_db($dbname, $this->link);
	}

	function fetch_array($query, $result_type = MYSQL_ASSOC) {
		return mysql_fetch_array($query, $result_type);
	}

	function query($sql, $type = '') {
		if(BUG_NO) {
			global $_TOBY;
			$sqlstarttime = $sqlendttime = 0;
			$mtime = explode(' ', microtime());
			$sqlstarttime = number_format(($mtime[1] + $mtime[0] - $_TOBY['supe_starttime']), 6) * 1000;
		}
		$func = $type == 'UNBUFFERED' && @function_exists('mysql_unbuffered_query') ?
			'mysql_unbuffered_query' : 'mysql_query';
		if(!($query = $func($sql, $this->link)) && $type != 'SILENT') {
			$this->halt('MySQL Query Error', $sql);
		}
		if(BUG_NO) {
			$mtime = explode(' ', microtime());
			$sqlendttime = number_format(($mtime[1] + $mtime[0] - $_TOBY['supe_starttime']), 6) * 1000;
			$sqltime = round(($sqlendttime - $sqlstarttime), 3);

			$explain = array();
			$info = mysql_info();
			if($query && preg_match("/^(select )/i", $sql)) {
				$explain = mysql_fetch_assoc(mysql_query('EXPLAIN '.$sql, $this->link));
			}
			$_TOBY['debug_query'][] = array('sql'=>$sql, 'time'=>$sqltime, 'info'=>$info, 'explain'=>$explain);
		}
		$this->querynum++;
		return $query;
	}

	 
	 // SQL添加语句并返回ID
	 function db_query_return_id($sql){
	 	$sqlstr = $this->query($sql);
		$sqlstr = mysql_insert_id();
		return $sqlstr;
	 }
	 
	
	//查询返回数组
	function db_query_array($sql){
		$sql_arr=$this->query($sql);
		$sql_return=array();
		while($tmp=mysql_fetch_array($sql_arr)){
    		$sql_return[]=$tmp;
		}
		return $sql_return;
	}

	//条件查询返回一条记录
	 function db_query_one($sql){
	 	$sqlstr = $this->query($sql);
		$sqlone = mysql_fetch_array($sqlstr);
		return $sqlone;
	 }
	 
	 //计算记录数量
	 function db_rows($sql){
	 	$conn=$this->query($sql);
		$sqlstr = 0;
		if($conn)
	 	$sqlstr=mysql_num_rows($conn);
		
		return $sqlstr;
	 }
	 
	 
	 function affected_rows() {
		return mysql_affected_rows($this->link);
	}

	function error() {
		return (($this->link) ? mysql_error($this->link) : mysql_error());
	}

	function errno() {
		return intval(($this->link) ? mysql_errno($this->link) : mysql_errno());
	}

	function result($query, $row) {
		$query = @mysql_result($query, $row);
		return $query;
	}

	function num_rows($query) {
		$query = mysql_num_rows($query);
		return $query;
	}

	function num_fields($query) {
		return mysql_num_fields($query);
	}

	function free_result($query) {
		return mysql_free_result($query);
	}

	function insert_id() {
		return ($id = mysql_insert_id($this->link)) >= 0 ? $id : $this->result($this->query("SELECT last_insert_id()"), 0);
	}

	function fetch_row($query) {
		$query = mysql_fetch_row($query);
		return $query;
	}

	function fetch_fields($query) {
		return mysql_fetch_field($query);
	}

	function version() {
		return mysql_get_server_info($this->link);
	}

	function close() {
		return mysql_close($this->link);
	}



	
	//添加数据
	function inserttable($tablename, $insertsqlarr, $returnid=0, $replace = false, $silent=0) {
		$insertkeysql = $insertvaluesql = $comma = '';
		foreach ($insertsqlarr as $insert_key => $insert_value) {
			$insertkeysql .= $comma.'`'.$insert_key.'`';
			$insertvaluesql .= $comma.'\''.$insert_value.'\'';
			$comma = ', ';
		}
		$method = $replace?'REPLACE':'INSERT';
		$this->query($method.' INTO '.$this->tname($tablename).' ('.$insertkeysql.') VALUES ('.$insertvaluesql.')', $silent?'SILENT':'');
		if($returnid && !$replace) {
			return $this->insert_id();
		}
	}
	
	//更新数据
	function updatetable($tablename, $setsqlarr, $wheresqlarr, $silent=0) {
	
		$setsql = $comma = '';
		foreach ($setsqlarr as $set_key => $set_value) {//fix
			$setsql .= $comma.'`'.$set_key.'`'.'=\''.$set_value.'\'';
			$comma = ', ';
		}
		$where = $comma = '';
		if(empty($wheresqlarr)) {
			$where = '1';
		} elseif(is_array($wheresqlarr)) {
			foreach ($wheresqlarr as $key => $value) {
				$where .= $comma.'`'.$key.'`'.'=\''.$value.'\'';
				$comma = ' AND ';
			}
		} else {
			$where = $wheresqlarr;
		}
		$this->query('UPDATE '.$this->tname($tablename).' SET '.$setsql.' WHERE '.$where, $silent?'SILENT':'');
	}


	// 出错，与运行日志
	function halt($message = '', $sql = '') {
		$dberror = $this->error();
		$dberrno = $this->errno();
		$help_link = '#';
		echo "<div style=\"position:absolute;font-size:11px;font-family:verdana,arial;background:#EBEBEB;padding:0.5em;\">
				<b>MySQL Error</b><br>
				<b>Message</b>: $message<br>
				<b>SQL</b>: $sql<br>
				<b>Error</b>: $dberror<br>
				<b>Errno.</b>: $dberrno<br>
				<a href=\"$help_link\" target=\"_blank\">Click here to seek help.</a>
				</div>";
		exit();
	}
}

